US Bridges

I-5 over N-W Ramp E-N Ramp

Good

King County, Washington · 2.3 N JCT I-90 · Structure no. 0008195A0000000

Built
1967
58 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
95 ft
1 main span
Daily traffic
14,227
2012 count
Owner
State
State Highway Agency

About this bridge

I-5 over N-W Ramp E-N Ramp is a steel stringer/multi-beam or girder carrying I-5 over N-W Ramp E-N Ramp in King County, Washington. It was built in 1967, so it is 58 years old, older than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 14,227 vehicles a day, roughly 5% of them trucks, projected to reach 23,788 by 2036. The structure is 95 ft (29 m) long and 29 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesI-5
CrossesN-W Ramp E-N Ramp
Location2.3 N JCT I-90
RouteInterstate 5
CountyKing County
StateWashington
Coordinates47.62544, -122.33006
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.9 US tons
Inventory rating37 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length95 ft (29 m)
Longest span89 ft (27.1 m)
Deck width29 ft (8.7 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,227 (2012)
Projected traffic23,788 by 2036
Trucks5%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-5 over N-W Ramp E-N Ramp built?

It was built in 1967, making it 58 years old in 2025.

What condition is I-5 over N-W Ramp E-N Ramp in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2023.

How much traffic does I-5 over N-W Ramp E-N Ramp carry?

About 14,227 vehicles per day (2012 count), of which roughly 5% are trucks.

How long is I-5 over N-W Ramp E-N Ramp?

The structure is 95 ft (29 m) long with a longest span of 89 ft (27.1 m) and a deck 29 ft wide.

Who owns I-5 over N-W Ramp E-N Ramp?

It is owned by the State Highway Agency.